• Title, Summary, Keyword: natural antimicrobial

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Study on the Antimicrobial Activity of Impatiens balsamina(III) (봉선화 추출물의 항균성에 관한 연구(III))

  • 최석철;정진순
    • Textile Science and Engineering
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    • v.36 no.4
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    • pp.338-343
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    • 1999
  • To develop a natural antimicrobial dyed fabric, water extracts were prepared from Impatiens balsamina leaf and stem. Wool and silk fabrics dyed with Impatiens balsamina extract were tested for antimicrobial activities aganist Staphylococcus aureus KCTC 1928 (St. aureus) and Trichopyton mentagrophytes (T. mentagrophytes) which are used in antimicrobial test of fabrics. The results were as follows Antimicrobial activity of wool and silk dyed with Impatiens balsamina extract increased with of dyeing and concentration of dye bath. The dyed silk fabric had higher antimicrobial activity than the dyed wool fabric. The fabrics dyed with leaf extract had higher antimicrobial activity than those dyed with stem extract.

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Antimicrobial Effect, Antioxidant and Tyrosinase Inhibitory Activity of the Extract from Different Parts of Phytolacca americana L.

  • Boo, Hee-Ock;Park, Jeong-Hun;Woo, Sun-Hee;Park, Hyeon-Yong
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.60 no.3
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    • pp.366-373
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    • 2015
  • This study was conducted to clarify the antimicrobial effect, antioxidant and tyrosinase inhibitory activities of the biological composition having the Phytolacca americana, and to enhance the natural materials utilization of foods and cosmetics. The antimicrobial activities of the different parts of P. americana were evaluated using the agar diffusion test. The antimicrobial activity of P. americana was relatively high in Malassezia furfur known as a skin fungi and Vibrio parahaemolyticus compared to Escherichia coli and Staphy-lococcus epidermidis. However, the antimicrobial activity in Vibrio parahaemolyticus did not show at all parts of P. americana. Both the DPPH radical scavenging activity and ABTS radical scavenging activity have been increased with the higher concentration of methanol extract. In particular, leaf extract of P. americana exhibited the highest activity both ABTS radical scavenging activity and DPPH radical scavenging activity. The nitrite scavenging activity was decreased when the pH was changed from pH 1.2 to pH 6.0. The highest nitrite scavenging activity was exhibited from the methanol extract of fruit, followed by root, stem, and leaf at pH 1.2. However, the nitrite scavenging activity at pH of 6.0 was not almost detected. All plant parts of P. americana showed tyrosinase inhibitory activity. The highest activity was found in the stem, and followed by root, leaf, and fruit in order. These tyrosinase inhibitory activity was progressively increased in a concentration-dependent manner. In this experiment on the methanol extracts of different organ from P. americana, we confirmed that the extract of P. americana showed potent tyrosinase inhibitory activity. Taken together, we conjectured that the P. americana had the potent biological activities, therefore this plant having various functional components could be a good material for development into source of natural food additives and cosmetics.

Antibacterial Characteristics of the Extracts of Yellow Natural Dyes (황색계 천연색소 추출물의 항균 특성)

  • 한신영;최석철
    • Textile Coloration and Finishing
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    • v.12 no.5
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    • pp.315-322
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    • 2000
  • The purpose of this study was to investigate the antibacterial effects of natural colors extracted from yellow natural dyes(Tumeric, Amur Cork Tree and Onion Shell). The water and the methanol extracts of Tumeric and Amur Cork Tree significally decreased the growth of E. coli in vitro and the methanol extract of Tumeric exhibited the strongest inhibitory effect among the samples. Silk and nylon fabrics dyed with water and methanol extracts of the yellow natural dyes showed antimicrobial activities against E. coli and Staph aureus in the Bioassay Test. Nylon fabric dyed with methanol extracts of them showed strong antibacterial effect on E. coli compared with that of water extracts. However, slik fabrics dyed with the extracts could not reduce the growth of E. coli. Silk or nylon fabrics dyed with methanol or water extracts of yellow natural dyes showed antimicrobial activities against Staph aureus. The antimicrobial activity of the fabrics dyed with methanol extracts from Tumeric, Amur Cork Tree and Onion Shell was stronger than that of water extracts, especially, the fabrics dyed with Tumeric extract showed the highest antibacterial property among the dyed fabrics.

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Studies on the cytotoxicity and Antimicrobial Effects of the Extract of Houttuynia cordata (IV) (어성초 추출물의 세포독성과 향균효과 (IV))

  • Lee Jeong-Ho;Park Nang-Kyu;Yang Eun-Yeong;Lee Hyun-Ok;Han Dong-Min;Baek Seung-Hwa
    • Journal of Society of Preventive Korean Medicine
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    • v.4 no.1
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    • pp.144-151
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    • 2000
  • This study was carried out to evaluate cytotoxic effects of Houttuynia cordata Thunberg extracts on murine leukemia tumor cell lines. Disruptions in cell organelles were determined by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazol iumbromide (MMT) assay. The comparison of $IC_{50}$ values of Houttuynia cordata Thunberg extracts on $L1210,\;P388D_1$ and Vero cell lines showed that the methanol extract of Houttuynia cordata Thunberg indicated the most antitumor activity in the MTT assay. In order to develop a antimicrobial agent, dried Houttuynia cordata Thunberg was extracted with several solvents, and then antimicrobial activity was investigated. The minimal inhibitory concentration (MIC) of the extracted substance against microorganisms were also examined. Antimicrobial activity of amocla and ketoconazole as references was compared to those of other solvent extracts such as $H_2O$, n-hexane, chloroform, ethyl acetate ethanol and methanol. The antimicrobial activity of all extracts from the sample had growth inhibition activity against gram-negative bacteria, yam-positive bacteria and fungi $(MIC,\;>\;200\;{\mu} g/ml)$. These results suggest that the methanol soluble extract of Houttuynia cordata Thunberg may be a valuable choice for the studies on the treaeent of murine leukemia tumor cell lines and antimicrobial agents.

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Fabrication of Antimicrobial Wound Dressings Using Silver-Citrate Nanorods and Analysis of Their Wound-Healing Efficacy

  • Park, Yong Jin;Jeong, Jisu;Kim, Jae Seok;Choi, Dong Soo;Cho, Goang-Won;Park, Jin Seong;Lim, Jong Kuk
    • Journal of the Chosun Natural Science
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    • v.12 no.2
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    • pp.47-57
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    • 2019
  • Staphylococcus epidermidis is well-known not only as an innocuous normal flora species commonly isolated from human skin, but also as an important bacterial species to keep skin healthy, because this species can protect the human skin from pathogenic microorganisms. However, S. epidermidis turns into a potential pathogen in damaged skin, because these bacteria can easily form a biofilm on the wound area and provide antimicrobial resistance to other microorganisms embedded in the biofilm. Thus, it is important to kill S. epidermidis in the early stage of wound treatment and block the formation of biofilms in advance. In the present study, hydrogel wound dressings were fabricated using polyvinyl alcohol/polyethylene glycol containing silver citrate nanorods, which have been proven to have strong antimicrobial activity, especially against S. epidermidis, and their wound-healing efficacy was investigated in vivo using a rat experiment.

A Study on the Pharmaceutical Characteristics and Analysis of Natural Ginger Extract (천연 생강 추출물의 약리학적 특성 및 분석 연구)

  • Sung, Ki-Chun
    • Journal of the Korean Applied Science and Technology
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    • v.27 no.3
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    • pp.266-272
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    • 2010
  • Natural Ginger extract was extracted from Ginger component using ethanol as a solvent, and we tested various pharmaceutical characteristics in this extract. Characteristics experiment to use natural Ginger extract tested antimicrobial experiment using microbe, and analyzed organic and inorganic component with analysis instrument. From the result of characteristics experiment, some conclusions are obtained as follow. In this experiment, natural Ginger extract was obtained about 22.50 g-Ginger extract(extraction ratio : 1.80%) as liquid state of some viscous yellow-brown color. The result of antimicrobial experiment with staphylococcus aureus and aspergillus niger in microbe decreased more and more according to passage of reaction time. This phenomenon could know that Ginger extract has influenced to antimicrobial effect. In the result of instrumental analysis, aromatic organic components of benzimidazole(1.283), propyl isothiocyanate or isothiocyanic acid(1.477) etcs from Ginger extract were detected with GC/MS and inorganic component of Ca(27.6 ppm), K(24.08 ppm), Mg(6.03 ppm), Na(1.02 ppm), Zn(1.02 ppm), Sb(0.711 ppm) and Li(0.079 ppm) etcs from Ginger extract were detected with ICP/OES.

The Novel Biological Action of Antimicrobial Peptides via Apoptosis Induction

  • Cho, Jaeyong;Hwang, In-Sok;Choi, Hyemin;Hwang, Ji Hong;Hwang, Jae-Sam;Lee, Dong Gun
    • Journal of Microbiology and Biotechnology
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    • v.22 no.11
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    • pp.1457-1466
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    • 2012
  • Antimicrobial peptides (AMPs) exert antimicrobial activity against Gram-positive and Gram-negative bacteria, fungi, and viruses by various mechanisms. AMPs commonly possess particular characteristics by harboring cationic and amphipathic structures and binding to cell membranes, resulting in the leakage of essential cell contents by forming pores or disturbing lipid organization. These membrane disruptive mechanisms of AMPs are possible to explain according to the various structure forming pores in the membrane. Some AMPs inhibit DNA and/or RNA synthesis as well as apoptosis induction by reactive oxygen species (ROS) accumulation and mitochondrial dysfunction. Specifically, mitochondria play a major role in the apoptotic pathway. During apoptosis induced by AMPs, cells undergo cytochrome c release, caspase activation, phosphatidylserine externalization, plasma or mitochondrial membrane depolarization, DNA and nuclei damage, cell shrinkage, apoptotic body formation, and membrane blebbing. Even AMPs, which have been reported to exert membrane-active mechanisms, induce apoptosis in yeast. These phenomena were also discovered in tumor cells treated with AMPs. The apoptosis mechanism of AMPs is available for various therapeutics such as antibiotics for antibiotic-resistant pathogens that resist to the membrane active mechanism, and antitumor agents with selectivity to tumor cells.

Antimicrobial Activity of Essential Oil against Oral Strain

  • Park, Chungmu;Yoon, Hyunseo
    • International Journal of Clinical Preventive Dentistry
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    • v.14 no.4
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    • pp.216-221
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    • 2018
  • Objective: In this study, we tried to investigate the antimicrobial activity of natural herbaceous plant-derived essential oils against oral disease-causing bacterial strains and establish the scientific evidences to apply them to the dentifrice, mouthwash, and other uses. Methods: We used the disk diffusion method with 23 types of 100% natural essential oils to verify the antimicrobial effect against Streptococcus mutans, Porphyromonas gingivalis, and Lactobacillus rhamnosus. After adhering to the surface of the plate culture medium, $20{\mu}l$ of the essential oil was prepared, and the diameter of the transparent ring was measured after incubation for 24 hours. All the experiments were repeated three times. Results: Among 23 types of oils, 13 were effective against all three strains: myrrh, ginger, basil, carrot seed, tea tree, patchouli, ylang ylang, cypress, lemongrass, cinnamon, peppermint, lavender, and eucalryptus. Seventeen oils were effective against S. mutans, and myrrh, basil, and carrot seed showed high antimicrobial activity. Eighteen oils were effective against P. gingivalis, and tea tree, carrot seed, and cinnamons showed high antimicrobial activity. Sixteen oils were effective against L. rhamnosus, and carrot seed and peppermint cinnamon showed high antimicrobial activity. Conclusion: Consequently, 13 essential oils showed the antimicrobial activity against three bacterial strains, which indicates these essential oils might be used as the effective materials to suppress the growth of oral-disease inducing microorganisms. Moreover, essential oils that have been analyzed activities in this study will be mixed up within the constant range and analyzed their antimicrobial effects to examine the synergistic activity among them.

Antimicrobial Activity of Natural Quercetin Alone and in Combination with Some Antibiotics (천연 퀘루세틴이 수종 항생물질의 항균력에 미치는 병용효과)

  • Eo, Seong-Kug;Kim, Young-So;Lee, Chong-Kil;Lee, Do-Ik;Kim, Il-Hyuk;Han, Seong-Sun
    • YAKHAK HOEJI
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    • v.40 no.6
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    • pp.653-658
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    • 1996
  • As part of our search for less toxic antimicrobial agents from natural resources. rutin was isolated from Sophora japonica and then hydrolyzed to quercetin. Antimicrobial activity of quercetin was tested in vitro against five kinds of gram positive and ten kinds of gram negative bacteria by serial broth dilution method. Among fifteen kinds of bacteria tested, the antimicrobial activity of quercetin was the most potent against Proteus vulgaris showing minimal inhibitory concentration(MIC) of 125 ${\mu}$g/ml. To investigate the effect of antimicrobial combinations of quercetin with four kinds of antibiotics (ampicillin, cefazolin, oxytetracycline and chloramphenicol). the fractional inhibitory concentration index (FICI) was determined by checkerboard assay for each strain. The antimicrobial combinations of quercetin with four kinds of antibiotics resulted in synergism in one instance, additive effect in four instances, but no antagonism was observed.

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Anti-inflammatory and Antimicrobial activities of Petroleum ether and Ethanol extracts of Scutia myrtina (Rhamnaceae)

  • Kritheka, N;Kumar, R Sambath;Kumar, S Suresh;Murthy, N Venkateswara;Sundram, R Shanmuga;Perumal, P
    • Oriental Pharmacy and Experimental Medicine
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    • v.8 no.4
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    • pp.400-407
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    • 2008
  • The aim of the present study is to investigate the anti-inflammatory and antimicrobial activity of petroleum ether and ethanol extracts of Scutia myrtina (Family: Rhamnaceae). In anti-inflammatory activity carrageenan and histamine induced paw oedema and cotton pellet induced granuloma for acute and chronic inflammatory models were studied in Wister albino rats. Based on the results of the present study it can be concluded that petroleum ether and ethanol extract of Scutia myrtina at 400 mg/kg has potential anti-inflammatory effect and they act in a dose dependent manner. Both extracts of Scutia myrtina showed antimicrobial activity against all bacterial and fungal strains tested at the concentration of $100\;{\mu}g$/ml. From the result, it can be concluded that the Scutia myrtina contain antibacterial and antifungal principle. Further more, besides the confirmation of the popular use; the obtained results demonstrate this herbal drug to represent a new source of antimicrobial and anti-inflammatory agent.